Thursday, January 17, 2013

1301.3544 (Muneto Nitta et al.)

Kelvin waves or Kelvons have been known for a long time as gapless excitations propagating along superfluid vortices. These modes can be interpreted as the Nambu-Goldstone excitations arising from the spontaneous breaking of the translational symmetry. Recently a different type of gapless excitations localized on strings -- the so-called non-Abelian modes -- attracted much attention in high-energy physics. We discuss their relevance in condensed matter physics. Although we failed to find exactly gapless non-Abelian modes, non-Abelian rotational quasi-gapless excitations are argued to exist on the mass vortices in the B phase of the superfluid 3He, due to the fact that the order parameter in 3He-B is tensorial. While the U(1) rotational excitations are well established in vortices with asymmetric cores, the non-Abelian rotational excitations, belonging to the same family, were not considered. In the general case they are coupled with the translational modes.

Followers

About CPR

A site to capture the informal process of peer review that happens daily in academia. This is intended to be a useful resource for authors, referees, and editors of journals to optimize their publications based on input from the accumulated expertise of their community.